Hi. I see you are in Tokyo. Loneliness is really a world wide epidemic. I get the impression that japan has quite a different culture ( and to us maybe a bit strange) to the us and the uk, but i guess the same applies. Join clubs , when you are out talk to people, join common interest groups, exercise with people. Rather than trying too hard to find a friend, feel good about yourself first, be positive, ditch negative people. Positive, friendly, open ( not narcissistic or egocentric) people attract people, negative people repel people or attract like minded people who find comfort in misery. Just my thoughts. Good luck.